Any current exceeding rated current of protective device (exceeding maximum ultimate trip current for circuit breakers) This includes both overload and short-circuit currents
any current beyond the continuous rated current of the conductor or equipment This may be value slightly above the rating as in the case of an overload, or may be far above the rating as in the case of a short circuit
Any current that is in excess of the rated current of equipment or the ampacity of a conductor and maybe caused by an overload, short circuit, or ground fault